Straight-arm hoist for dumping-vehicles.



R. w. Rosi. STRAIGHT ARM HOIST FOR DUMPING VEHICLES APELICATION FILED FEB. 21,1917.

,294,173. Patente Feb. ll, HB9,

l @www Mig UNITED sTATEs iPATEiaTA oEEioE.

ROBERT 4ViT. BDSE, 0F MARBLEHEAD, MASSACHUSETTS.

Specification of Letters Patent.

STRAXGHT-ABM EOIST FOR, DUMPING-VEHICLES. i

Patented Feb. 11, 1919.

Application led February 21, 1917. Serial No. 150,059.

hoisting apparatus comprising a pair of sub- I stantially straight arm hoisting levers, having one end pivotally secured to the dumping wagon body and the other end adapted to roll upon a guideway. The straight arm levers arranged at either side of the wagon body, are normally folded between the body and thc vehicle frame in a substantially horizontal position, to save room, and by the provision of novel means to permit the rst hoisting' action to raise or tilt the vehicle body and thus give a working inclination to the hoisting levers, I am enabled to produce a simple and efficient construction. l accomplish this purpose by providing a' substantially perpendicularly extending strut from the hoisting levers and so arranging lthe cables or chains which actuatc the said levers to provide the initial vertical lift through said strut, as thc chain or cable is wound up on the shaft or drum, securing a sufficient inclination to enable the lever itself to then take up the thrust. havingbeen lifted out 'ot its substantially horizont-al position, and complete the inclination of the dumping body. The present apparatus is an improvef ving the construction.

v and wagon bod)v illustrating. in dotted liues the raised position.

Vlelerring to the drawings illustrating a .preferred embodiment of the invention,

The figure shows a side view of a support In-dumping bodies ot'this type it is customary to build such a body-upon the chassis I ot an 'automobile or othe. vehicle, but the that any suitable vehicle `upport may be employed. To lit upon the chassis. l provide chassis is noi` shown, `it J.ing understood a pair of side arms l across which arebeams 2, 3, 4 and 5, on which beams are a pair of longitudinal supports 6, one on either side of the vehicle and adapted to receive the tilting body 7 in lowered position, the cross beams 8, 8, of said body, resting directly upon the Aparallel supports 6, as clearly shown in the drawing. Secured at each side to a support 6 and its adjacent side frame 1 is a track 9 slightly inclined, which track may be of angle iron or other suitable construction. Said track has its upper end leading adjacent the shaft l0, which preferably extends across the wagon in suitable bearings in the support G, which shaft is adapted to be rotated by a series of gears and pinions 11, 12, 13 and 14, the latter being actuated by a crank or other power, in a well known manner. i

The tilting body 7 is pivoted at 15, near its.

a cross brace 18 on the body 7. and at the` 'other end of said levelgis a roll 19, preferably fianged and adapted to traverse the track 9. Near the pivoted end 17 on each lever, I provide a perpendicularly extending strut 20. preferably uniting the struts on either side by a cross rod 21, which latter engages the chain or cable 22 having one end secured .to the shaft 10 and the other end to the rod 23, .which rod may also constitute the bearing for the fianged roller 19. Two of these chains 22 are provided, both adapted to be wound upon the shaft 10 as the latter is rotated through the gears 11, 12, 13 and 14.

-ln the operation of the hoisting mechanism just, described; when the body 7 is in lowered position, the `first winding action of the chains 22 on the axle 10 results in securing a substantially vertical litt on the pivoted end 17 of the straight lever 16, such lift gradually tilting the body 7 upwardly on its rear pivots 15` and giving asuliicient inclination to the lever 16A as thesame rolls upon the track 9, to permit said levers eilieiently to take up the, tilting thrust when the strutsQ() and rod 21 have been raised to the extent permitted by the hoisting action ot thechain From this preliminary inclined posit-ion, the continued winding of the eliains 22 then moves the partially inclined lever 16 during the completion of the hoistf inclined position as shown in dotted lines,

is reached. This construction permits an extremely quick, economical and eiicient hoisting mechanism to be provided, and one capable of handling small loads readily. Furthermore, the complete folding down of the hoistin levers touapproximatcly hori zontal ositlon, affords a low center of'graw in ity, an still enables the hoisting mechanism to be constructed for the transmission of.

bearings, strains, etc., from the bottom of the tilting body to the frame supports on top of the chassis, eliminating depending tracks, and the like. y

\ My invention is further described and defined in the form of claims as follows;

1. Hoisting apparatus of the lkind described, comprising a support, a dumping body pivoted to said support and adapted to be hoisted at an inclination therewith, a pair of straight arm hoisting levers, one end of each of said levers being pivoted to the body and the other end carrying a roll, tracks for said rolls on each side of the supporting frame, a pair of chains from the roll ends of said levers to a shaft, said shaft positioned above the said track, a perpendicularly extending strut on each lever adjacent the piv oted end, a rod connecting said struts and bearing on. the chains from the shaft to the roll ends of said levers, whereby a substair tially vertical lifting action through said strut is secured, sufficient to raise the ,levers to an inclined position for continuing the thrusting action in the hoisting operation.

2. Hoisting apparatus of the kind described, coml rising a support, a dumping body pivote( to be hoisted at an inclination therewith, a pair of straight arm hoisting levers, one end of each of said levers being pivoted to the body and the other end carrying a. roll,

to said support and adapted straight tracks slightly inclined for said rolls at each side of the supporting frame, a pair of chains from the roll ends of said levers to a shaft, said shaft positioned above the said track, a perpendicularly extending strut on each lever adjacent the pivoted end, al'r'iid connecting said struts and bearing on tie chains from the shaft to the roll ends said levers, whereby the said levers may i in approximately a horizontal position /whcn the body is lowered and secure an initial li'lting to permit them to take "up and vcomplete the thrusting action. 3. Hoisting apparatus olf the kind described coinprisng a vehicle frame, a dum ing body carried thereby and adapted to Je hoisted at an inclination therewith, a pair of movable hoisting levers, one end vof each lever having a pivotal. connection with vsaid body, and the other end of each lever'carr rying a roll, a strut on eachv lever intermediate its end, tracks for each roll at the side of said frame, awinding shaft having its 'axle located above the tracks and substantially in vertical' alinement with the outer ends of said struts when the levers are in lowered position, flexible connections yi'rom the roll ends of each lever with a bearing over the struts to said winding shaft, whereby the initial hoisting oi1 the body will be effected by the substantial verticalfliftimY action of said fiexible connections, until sai struts have reached aheight substantially on a horizontal plane with the windingshaft, whereupon the continued hoisting action will shift to the outer ends of said levers.'

In testimony whereoi", I have signed my name to this specification, in the presence of two subscribing witnesses.

Witnesses:

HAROLD J. CLARK, DUNCAN L. MAolN'rr-ne. 

